6:45 AM
The lead story on most television and online news sources this morning is that the shuttle's nose cone has been found in a forest* in Texas.

* Not in another nose cone, as an earlier typo reported

I was busy facing down a deadline yesterday, so there was some information I didn't get a chance to post. Let's get up to speed:

NASA has announced the makeup of its investigatory panel.

At Sunday's press conference, a memorial service was announced for 1 PM EST Tuesday; later in the day, the President announced that he would attend. The next NASA press conference will follow later that afternoon.

Video has now been posted with the transcript of the President's Saturday speech on the White House web site.

Also at the Sunday press conference, Shuttle program manager Ron Dittemore gave a timeline of events that they are closely investigating:

At 7:52 a.m. CST, three-left main gear brake line temperature sensors showed an unusual rise in the left wheel well area. · At 7:53 a.m., a fourth left brake line strut actuator temperature sensor showed a 30-40 degree rise in temperature over a five-minute period, slightly higher than reported yesterday. · At 7:55 a.m., A fifth left brake line main gear sensor showed a sharp rise in temperature. · At 7:57 a.m., left wing temperature sensors failed "off-scale low", meaning no further data was being received on the ground. · And at 7:59 a.m., just before communications was lost with Columbia, there was evidence of drag on the aerosurfaces of the left wing, causing two out of four yaw steering jets in that area of the Shuttle to fire for 1.5 seconds to counteract the increased drag.

Spaceflightnow.com's story on this information, "NASA seeks 'missing link' in Columbia investigation", reports investigating engineers saying that while the problem might have involved the left wheel well, it likely wasn't centered on it.

More online reporting on the disaster is gathered at the CBS News coverage page and on ABCNews online.